how many people smoke cigarettes in usa Poll: U.S. Smoking Rate Falls To Historic Low [Infographic] Smoking Facts and Statistics

A 2012 study in PLoS One showed that smokers had significantly higher levels of insulin resistance compared to non-smokerseven after adjusting for BMI and lifestyle factors

Companies that make or sell e-cigarettes must follow certain Food and Drug Administration (FDA) regulations

Related story: $100 cigarettes, $81 beer: How much everyday items will cost in 2030 Related story: The one habit that will more than double your life insurance fees Related story: Workers score 4 days of leave for kicking smoking habit In fact, at around $35 for a pack of 20, Australia's cigarettes are the most expensive in the world

Never Too Young to Quit